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Alternative names Return to top
X-ray - teethDefinition Return to top
Dental X-rays are a type of picture of the teeth and mouth. X-rays are a form of electromagnetic radiation, just like visible light. They are of higher energy, however, and can penetrate the body to form an image on film.
Structures that are dense (such as silver fillings or metal restoration) will block most of the photons and will appear white on developed film. Structures containing air will be black on film, and teeth, tissue, and fluid will appear as shades of gray.
How the test is performed Return to top
The test is performed in the dentist's office. The most common procedure is a bite-wing, where a small piece of film is placed in the mouth behind a section of the teeth. You are asked to bite down on the paper tab around the film, which holds the film in place.
The X-ray machine is aimed at that section of teeth, and a picture is taken. Most dental X-rays include four or more views of the teeth.
How to prepare for the test Return to top
There is no special preparation.How the test will feel Return to top
The X-ray itself causes no discomfort. Some people find that biting on the piece of film makes them gag; slow, deep breathing through the nose usually relieves this feeling.Why the test is performed Return to top
Dental X-rays are useful in the diagnosis of dental diseases and injury.Normal Values Return to top
Normal number, structure, and position of the teeth and jaw bones. No cavities or other abnormalities.What abnormal results mean Return to top
Dental X-rays may be used to identify the following:What the risks are Return to top
There is very low radiation exposure. However, no one should receive more radiation than necessary. A lead apron can be used to cover the body to reduce radiation exposure, especially for women who are or may be pregnant.Special considerations Return to top
Dental X-rays can reveal tooth decay (cavities) before they are visible even to the dentist. Many dentists will take yearly bite-wings to catch the early development of cavities. Update Date: 10/20/2003 Updated by: Michael Kapner, D.D.S., Comprehensive and Aesthetic Dentistry, New Rochelle, N.Y., Editor, Ninth District Dental Association. Review provided by VeriMed Healthcare Network.
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Page last updated: 28 October 2004 |